Differences between streaming URLs

Hello,

I have TV Headend 3.9.1780 installed and I'm having a few minor issues with streaming URLs.

These are the URL formats in question:

(Note: Difference is the "/play/" keyword in the URL.)

URL #1 cannot be opened by FFmpeg whereas URL #2 works fine.

Can someone please tell me the difference between these formats and why #2 works and #1 doesn't?

Thanks!